MOSCOW, June 21 -- A private plane has taken off without permission from Ishim, a town in southern Russia's Tyumen region, and is heading in the direction of Moscow, local media reported Sunday.

Unknown people made unauthorized take-offs early Sunday morning, according to an online statement released by the Investigation Department of the Ural Federal District.

It is impossible to talk about hijack, the Interfax news agency cited the press service of the Investigation Department as saying.

The statement said that at the beginning, those people took a private jet, a Gardan GY-80-160 light aircraft, which collided with engineering facilities in the airfield due to technical failure.

Later, they changed to another private plane, a Yak-52, and are currently heading in the direction of Moscow, the Tass news agency quoted a local law enforcement source as saying.

The Investigation Department of the Ural Federal District has begun investigation and is trying to locate the Yak-52.